Little BIG Perfect should be the title to this game!!!
And of course the other thing which makes LBP great would have to be the Sackboys themselves with the ability for the player to change face expressions and grab and slap other players in the face its super fun.
However there are a few little problems which I and many other people have noticed.
For starters playing with 2 or more people on split screen can be annoying since the camera drags to the side a lot and so its hard to see what u r doing half of the times. Not only that but create mode can be annoying also when you build a huge hill for example and you may place something on it and if u wished to delete the item afterwards it can usually pull the hill of the ground instead and so anything which is on or connected to it will therefore get chucked of, and so u have to put it all back again which wastes time. Plus if u use the same material for example too much sometimes it says that the object your creating is getting too complicated which usually thats not the case and u may need that certain material to finsih something your building.
I have also noticed that some people also complain about the story length which too me is fine since I haven't even finshed it yet because of its difficulty and I have been collecting as many secret objects, materials etc from them which I can find as possible. But thats about it for the bad points
Overall this is a superb game and will help of the success of the PS3 there are a few bad points yes but it won't lead to the games downfall in anyway and can be easily ignored and avoided if careful
Overall rating 10/10 since this was worth the hype
To me I would still preffer Metal Gear Solid 4 but I would recommend both to buy since their essential games.
with its brillaint gameplay, real life physics, gameplay and of course the fun you'll have every second your playing